Hydraulic stump splitter and puller



H. .I. DANA.

HYDRAULIQSTUMP SPLITTER AND FULLER.

APPLICATION FILED DEC-7. 1911.

Patented Feb. 10, 1920.

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H. .l. DANA.

HYDRAULIC STUMP SPLITTER AND FULLER.

APPLICATION FILED DEC.7.1917.

wtmm H.'J. DANA.

HYDRAULIC STUMP SPLITTER AND FULLER.

APPLICATIONHLED DEC-7, 1917.

1,330,687. Patented Feb. 10,1920.

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HYDRAULIC STUMP SPLITTER AND FULLER.

APPLICATION FILED DEC .7,19l7.

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252 505 .l NO I H m w HOMER J. DANA, OF GONN II'RLL, WASHJ INGTON.

HYDRAULIC STUMP SPLITTER AND PULLEIt.

Specification of Letters Patent.

Patented Feb. 10, 1920.

Application filed December 7, 1917. Serial No. 206,044.

and subsequently pull or extract the same,

the several sets of mechanisms being under the control of a single operator.

The principal object of the invention is to produce a novel form of hydraulic mechanism embodying in combination with a piston and cylinder, a compensation chamber having. a. novel relation thereto and serving to eliminate all danger of excessive pressure of water or other liquid in the cylinder, making it practically impossible for a careless operator to wreck the cylinder.

A further object is to mount the hydraulic mechanism on a self-propelled truck and combine therewith means for splitting stumps and also means. for pulling or extracting the same either before or after being split.

A. further object of the invention is to provide a novel construction of grip to be used in conjunction with the cable and windlass during the operation of extracting stumps and the like.

the power-of the engine is utilized, the engine being for the time uncoupled from the driving gear of the vehicle.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts, herein fully described, illustrated and claimed.

In the accompanying drawings Figure 1 is a plan view of the improved hydraulic stump splitter and puller.

Fig. 2 is a side elevation of the same with the parts insection. I r I Fig. 3 is a vertical transverse section on the line 3- -3 of Fig. 2.

4 is a vertical transverse section on the line 4-4 of Fig. 2.

4 --Fig. dis a' dianietricaksection throligh"the" In the operations of splitting and extracting stumps and the like,

hydraulic. cylinder illustrating the construction of the heads thereof.

Fig. 6 is a fragmentary plan view showing themeans for supporting one end of the hydraulic cylinder.

Fig. 7 is a fragmentary side elevation showing the pump, the hydraulic cylinder, and the connections between the same including the valve.

Fig. 8 is a similar view showing the reversed position of the valve.

Fig. 9 is a side elevation of the cable grip.

Fig. 10 is a vertical longitudinal section of the same.

Fig. 11 is a plan view thereof.

The vehicle or truck comprises a substantially rectangular frame comprising the longitudinal side bars 1 of I-beam formation connected in fixed relation to each other by a plurality of cross bars as shown in Fig. 1. 2 designates the rear axle, 3 the front axle, 4 the driving or traction wheels and 5' the front or steering wheels.

Mounted upon the truck frame about centrally thereof is an engine 6, such as an internal combustion engine, the same being supported upon cross cars 7 and 8 of the truck frame. 9 designates the flywheel of the engine connected by a clutch, in accordance with motor vehicle practice, with a longitudinal shaft 10 journaled in bearings on cross bars 11 and 12 of the frame. Parallel to the shaft 10 is -.a countershaft 13' carrying gears 14, 15 and 16 for low speed, high speed and reverse the gears 17 and 18 being movable into and out of mesh with gears 14: and 15 on the, shaft 10, and the gear 16 meshing indirectlv through another gear with a gear 19 on the shaft 10. The gearing corresponds with the sliding gear transmission now employed in motor vehicle practice, anv su table or u ual means under the control of the driver being provided for shifting the gears to obtain high or low speed and reverse.

Extending rearwardly beyond the countershaft 18, and in a plane parallel thereto is a second countershaft 20 connected to and driven by the shaft 18 by means of gears 21 and 22. The shaft ;20 is provided witha pump controlling clutch 23 and at itsrear end the shaft 20 has fast thereon a bevel gear 24 which meshes with a bevel gear 25 on a pump driving shaft 26. The counter:

h f13 1s in 'rea lb eis rs I 2 will 22am ha fast" thereofia" bevel 'pimon 27' which meshes with and drives a large bevel gear 28 on a sectional transverse shaft 29, the sections of which are connected by differential gearing 30. On the opposite ends of the shaft 29 there are pinions 81 which mesh with gears 32 housed within recesses 33 in the inner faces of the driving or traction wheels 1. A clutch as associated with the countershaft 13 enables the engine 6 to be uncoupled from the driving mechanism of the vehicle so that the power of said engine may be utilized for splitting and extracting stumps.

Arranged under the frame of the truck is a longitudinally extending hydraulic cylinder 35 which, in connection with a pump 36 is best illustrated in Figs. 5, 7 and 8. 36 designates the hydraulic cylinder proper which is provided at both ends thereof with a double or two-piece head. The inner member 37 of the head is formed with a central opening 38 to receive the adjacent end of the cylinder 36 and the outer member 39 of the head is formed with a rabbet 4-0 to rece *e a corresponding enlargement 4-1 on the meeting face of the member 87. lhis provides a liquid tight joint between the sections of the head. At one end, the outer member 3!) of the cylinder head is provided with a stuffing box 12 through which recinroeates the rod of a: piston 44 mounted for back and forth movement in the cylinder 36. Located adjacent to the cylinder 36 is a compensation cylinder or chamber 45 which extends parallel to the cylind r 36. From the pump 36, a pipe 16 containing a check valve 47 extends to a port 4-8 in one head of the cylinder 36. Another pipe 419 containing a check valve 50 extends from the pump 86 to a port 51 in the other head of the cylinder. A pipe 52 extends from one end of the compensation chamber or cylinder as to the pipe 16. The pipes 4:6 and 49 are connected to the casing of a two-way valve 53 which in one position permits the liquid to flow in one direcion and which, when given a quarter turn. directs the liquid in the opposite direction. As shown in Fig. 7, the liquid forced by the pump 36 is flowing in the direction inclicated by the arrows, while Fig. 8 illustrates the other position of the valve when the liuuid is flowing in the reverse direction. The cylinder .86 also has release cocks 54 connected with the opposite heads thereof as shown in Fig. 7.

The means for supporting the cylinder 86 in relation to the frame of the truck is illustrated in Fig. 6 in which it will be seen that a cross bar 55 extends between the side bars 1 of the frame and is fixedly secured thereto by fastening means 56. The central portion of the cross bar 55 has a semi-circular depressed portion 57 forming a receiving saddle for the adjacent head 39 of the cylinder 36 and said cylinder head has supporting lugs 39 which rest on the frame.

Secured fixedly to the projecting end of a piston or plunger rod 13 is a wedge shaped stump splitting head 59 having a plurality of holes 60 extending vertically therethrough to receive the fastening bolts of the cable grip. The cable grip, which is illustrated in Figs. 9, 10 and 11, comprises a pair of supporting arms 61 which are fastened by bolts 6:2 to the stump splitting head 59, the bolts 62 being inserted through the holes 60. The arms 61 diverge from their point of attachment to head 59 and the extremities thereof are connected by one or more cross yokes or braces 63. The grip embodies a head 6 1 formed with recesses to admit of a limited movement of a pair of cable gripping jaws 65 designed to grip the cable 66 which is used for extricating stumps. Mounted on pivots 67 carried by the head 6 1 are two oppositely extending cam levers 68 which engage depressions 69 in the opposite faces of the jaws 65. The levers 68 extend through and work in slots 7 O in the arms 61 and are provided at their outer end with holes 71 to enable suitable operating connections to be attached there to. The connections referred to are not shown but will extend to a point within con venient reach of the operator of the machine.

The cable 66 is wound upon a drum 72 normally loose on a drum shaft 73 extending transversely of the machine frame. Normally loose on the same shaft 7 3 is a second drum 74-. designed to have what is known as the trip line wound thereon. The shaft 7 3 has a gear 75 thereon which is driven by a pinion 7 6 on a driving shaft 77 parallel to the shaft 73 and driven from the countershaft 13 by means of a pinion 78 on said countershaft which meshes with and drives a gear 79 on the shaft 7 7 The means for throwing the drums 72 and 74 into and out of operation, comprises in eachcase a fixed cam collar 80 surrounding the end portion of the shaft 73 and held rigidly by an arm 81 extending in one case, from one of the side bars 1 of the frame, and in the other instance from an extension cross bar 82 of the frame. Between the cam collar 80 and the adjacent head of the drum there is positioned another collar 83 loose on the shaft 7 3, which, when turned in one direction by means of a lever arm 8i having a fixed relation to the collar-83, imparts a partial rotative movement of the collar 83 thereby pressing the adjacent drum toward the center of the machine where it engages a clutch member 85 fast on the shaft 73. Any suitable manually controlled connections may be employed for operating the arms 84 of the cam collars 83. For the purpose of holding or anchoring the truck, the latter is provided at one end thereof with draw bars 86 to which suitable anchoring chains or cables (not shown) may be fastened. Any suitable or preferred arrangement of steering mechanism may be employed to connect the steering knuckles 87 of the steering Wheels with the steering shaft 88 having at its upper end the usual hand steering wheel 89.

From the foregoing description taken in connection with the accompanying drawings it will now be understood that the power of the engine is transmitted to the driving mechanism of the vehicle, for the purpose of propelling the same to and from the point of operation. Upon reaching the point of operation, the engine and the vehicle driving mechanism may be uncoupled or disconnected and then the engine may be coupled to the pump driving mechanism and also to the stump splitting and pulling or extricating mechanism. The compensation chamber prevents over pressure in the hydraulic cylinder, eliminating all danger of filling the cylinder too full of water and thereby making it impossible for a careless operator to wreck the cylinder. This is due to the fact that the compensation chamber affords receiving space for the water or other liquid displaced by the piston rod 43 in the inward movement thereof. By forcing water under pressure into the left hand end of the cylinder in Fig. 5, the piston H is driven to the right, thereby forcing the splitting head 59 into or through the stump being operated upon". When the desired numberof stumps have been split, the cable grip hereinabove described is fastened to the head 59 and then the cable 66 is secured to a stump or to one or more of the split portions thereof and when the piston 442 is driven to the left in Fig. 5, the stump is eX- tricated 'by the hydraulic pressure in the cylinder 36. The cable in connection with the operating mechanism therefor is also to be used in moving and piling logs, trees and stumps.

I claim 1. In a hydraulic stump splitter and puller, the combination of a truck, traction and steering wheels supporting the truck frame, an engine mounted on the truck frame, clutch controlled driving mechanism between said engine and the traction wheels,

a hydraulic cylinder extending lengthwise of the truck frame and supported thereby, a piston in said cylinder, a piston rod actuated by said piston, a pump, pipes connecting said pump with opposite heads of the hydraulic cylinder, a two-way valve control ling said pipes, a compensation chamber in communication with one end of said hydraulic cylinder, a stump splitting head carried by said piston rod, a cable holding drum, means for throwing said drum into and out of operation, driving means between the engine and said drum, a cable grip detachably secured to said stum splitting head, said cable grip comprising oppositely arranged arms secured at one end to the stump splitting head, a yoke connecting the opposite ends of said arms, a head, cable gripping jaws movably supported in said head, and oppositely arranged cam levers journaled in said head and arranged in cooperative relation to said jaws, the arms of the grip being slotted to admit of the swinging movement of said cam levers.

2. In a hydraulic stump splitter and puller, the combination of a truck, traction and steering wheels supporting the truck frame, an engine mounted on the truck frame, clutch controlled driving mechanism between said engine and the traction wheels, a hydraulic cylinder extending lengthwise of the truck frame and supported thereby, a piston in said cylinder, a piston rod actu ated by said piston, a pump, pipes connecting said pump with opposite heads of the hydrauliccylinder, a two-way valve controlling said pipes, a compensation chamber in communication with one end of said hydraulic cylinder, a stump splitting head carried by said piston rod, a cable holding drum, means for throwing said drum into and out of operation, driving means be-' tween the engine and said drum, a cable grip detachably secured to said stump splitting head, said cable grip comprising oppositely arranged arms secured at one end to the stump splitting head, a yoke connecting the opposite ends of said arms, a head, cable grippping jaws movably supported in said head, and levers pivoted in said head and arranged in cooperative relation to said jaws.

In testimony whereof I affix my signature.

HOMER J. DANA. 

